1:58 a.m.
This is a result of mu discussion with Jing:
https://listman.redhat.com/archives/libvir-list/2021-September/msg00407.html
Turns out, the problem has nothing to do with my virtio-mem patches so
I'm sending fix separately.
Michal Prívozník (2):
qemuxml2argvtest: Introduce another numa-topology test
qemu_command: Generate -mem-prealloc in one corner case more
src/qemu/qemu_command.c | 17 ++++-----
.../fd-memory-numa-topology.args | 3 +-
.../fd-memory-numa-topology2.args | 5 +--
.../fd-memory-numa-topology3.args | 7 ++--
...d-memory-numa-topology4.x86_64-latest.args | 34 +++++++++++++++++
.../fd-memory-numa-topology4.xml | 37 +++++++++++++++++++
tests/qemuxml2argvtest.c | 1 +
...fd-memory-numa-topology4.x86_64-latest.xml | 1 +
tests/qemuxml2xmltest.c | 1 +
9 files changed, 88 insertions(+), 18 deletions(-)
create mode 100644 tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/fd-memory-numa-topology4.xml
create mode 120000 tests/qemuxml2xmloutdata/fd-memory-numa-topology4.x86_64-latest.xml
--
2.32.0
1:58 a.m.
New subject: [PATCH 1/2] qemuxml2argvtest: Introduce another numa-topology test
This test shows a bug we have: even though the XML says:
<allocation mode='immediate'/>
there is no -mem-prealloc nor .prealloc=yes anywhere on the cmd
line. This will be fixed in the next commit.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
...d-memory-numa-topology4.x86_64-latest.args | 33 +++++++++++++++++
.../fd-memory-numa-topology4.xml | 37 +++++++++++++++++++
tests/qemuxml2argvtest.c | 1 +
...fd-memory-numa-topology4.x86_64-latest.xml | 1 +
tests/qemuxml2xmltest.c | 1 +
5 files changed, 73 insertions(+)
create mode 100644 tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/fd-memory-numa-topology4.xml
create mode 120000 tests/qemuxml2xmloutdata/fd-memory-numa-topology4.x86_64-latest.xml
diff --git a/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
b/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
new file mode 100644
index 0000000000..203754373d
--- /dev/null
+++ b/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
@@ -0,0 +1,33 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-pc \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-pc/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-pc/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-pc/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=pc,debug-threads=on \
+-S \
+-object
'{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-pc/master-key.aes"}'
\
+-machine pc-i440fx-5.0,accel=kvm,usb=off,dump-guest-core=off \
+-cpu qemu64 \
+-m 1024 \
+-overcommit mem-lock=off \
+-smp 2,sockets=2,cores=1,threads=1 \
+-numa node,nodeid=0,cpus=0-1,mem=1024 \
+-uuid bb508b28-d57b-44bd-9e9c-a134cef24b60 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-audiodev id=audio1,driver=none \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/fd-memory-numa-topology4.xml
b/tests/qemuxml2argvdata/fd-memory-numa-topology4.xml
new file mode 100644
index 0000000000..2f5bd3e839
--- /dev/null
+++ b/tests/qemuxml2argvdata/fd-memory-numa-topology4.xml
@@ -0,0 +1,37 @@
+<domain type='kvm'>
+ <name>pc</name>
+ <uuid>bb508b28-d57b-44bd-9e9c-a134cef24b60</uuid>
+ <memory unit='KiB'>1179648</memory>
+ <currentMemory unit='KiB'>1179648</currentMemory>
+ <memoryBacking>
+ <allocation mode='immediate'/>
+ </memoryBacking>
+ <vcpu placement='static'>2</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc-i440fx-5.0'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <cpu mode='custom' match='exact' check='none'>
+ <model fallback='forbid'>qemu64</model>
+ <numa>
+ <cell id='0' cpus='0-1' memory='1048576'
unit='KiB' discard='yes'/>
+ </numa>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <controller type='usb' index='0' model='piix3-uhci'>
+ <address type='pci' domain='0x0000' bus='0x00'
slot='0x01' function='0x2'/>
+ </controller>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <audio id='1' type='none'/>
+ <memballoon model='virtio'>
+ <address type='pci' domain='0x0000' bus='0x00'
slot='0x02' function='0x0'/>
+ </memballoon>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 74af93b08f..46e176b0ec 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -3383,6 +3383,7 @@ mymain(void)
QEMU_CAPS_KVM);
DO_TEST("fd-memory-numa-topology3", QEMU_CAPS_OBJECT_MEMORY_FILE,
QEMU_CAPS_KVM);
+ DO_TEST_CAPS_LATEST("fd-memory-numa-topology4");
DO_TEST("fd-memory-no-numa-topology", QEMU_CAPS_OBJECT_MEMORY_FILE,
QEMU_CAPS_KVM);
diff --git a/tests/qemuxml2xmloutdata/fd-memory-numa-topology4.x86_64-latest.xml
b/tests/qemuxml2xmloutdata/fd-memory-numa-topology4.x86_64-latest.xml
new file mode 120000
index 0000000000..68c72e72ed
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/fd-memory-numa-topology4.x86_64-latest.xml
@@ -0,0 +1 @@
+../qemuxml2argvdata/fd-memory-numa-topology4.xml
\ No newline at end of file
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 6d3526f91f..8fa73dc9ac 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -1253,6 +1253,7 @@ mymain(void)
QEMU_CAPS_KVM);
DO_TEST("fd-memory-numa-topology3", QEMU_CAPS_OBJECT_MEMORY_FILE,
QEMU_CAPS_KVM);
+ DO_TEST_CAPS_LATEST("fd-memory-numa-topology4");
DO_TEST("fd-memory-no-numa-topology", QEMU_CAPS_OBJECT_MEMORY_FILE,
QEMU_CAPS_KVM);
--
2.32.0
1:58 a.m.
New subject: [PATCH 2/2] qemu_command: Generate -mem-prealloc in one corner case more
When guest has NUMA nodes and QEMU is new enough to report
default RAM ID then ideally we would use -numa memdev= combined
with memory-backend-* combo becasue -mem-path/-mem-prealloc/-numa
mem are deprecated. Well, there is one problem - the .memdev=
attribute is machine type dependent (just look at arguments of
virQEMUCapsGetMachineNumaMemSupported()) and to ensure backwards
compatibility we prefer -numa mem= over -numa memdev=.
But there was one corner case when -mem-prealloc was requested
but not generated on the cmd line. It all starts with
qemuBuildMemCommandLine() which generates just '-m XXX' and
because it sees defaultRAMid and guest NUMA nodes greater than
zero it does nothing more.
Then, qemuBuildNumaCommandLine() sees that -numa mem= is still
supported for given machine type and nothing else set
@needBackend thus qemuBuildMemPathStr() is called which output
-mem-prealloc only in a few cases assuming it was outputted
earlier.
Reported-by: Jing Qi <jinqi(a)redhat.com>
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
src/qemu/qemu_command.c | 17 ++++++++---------
.../fd-memory-numa-topology.args | 3 +--
.../fd-memory-numa-topology2.args | 5 ++---
.../fd-memory-numa-topology3.args | 7 +++----
.../fd-memory-numa-topology4.x86_64-latest.args | 1 +
5 files changed, 15 insertions(+), 18 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 73868ab4b7..e31eef3163 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7130,6 +7130,7 @@ qemuBuildMemPathStr(const virDomainDef *def,
g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(priv->driver);
const long system_page_size = virGetSystemPageSizeKB();
g_autofree char *mem_path = NULL;
+ bool prealloc = false;
/* There are two cases where we want to put -mem-path onto
* the command line: First one is when there are no guest
@@ -7143,19 +7144,22 @@ qemuBuildMemPathStr(const virDomainDef *def,
return -1;
if (qemuGetDomainHupageMemPath(priv->driver, def, pagesize, &mem_path)
< 0)
return -1;
+ prealloc = true;
} else if (def->mem.source == VIR_DOMAIN_MEMORY_SOURCE_FILE) {
if (qemuGetMemoryBackingPath(priv->driver, def, "ram",
&mem_path) < 0)
return -1;
- } else {
- return 0;
}
- if (def->mem.allocation != VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE) {
+ if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE)
+ prealloc = true;
+
+ if (prealloc && !priv->memPrealloc) {
virCommandAddArgList(cmd, "-mem-prealloc", NULL);
priv->memPrealloc = true;
}
- virCommandAddArgList(cmd, "-mem-path", mem_path, NULL);
+ if (mem_path)
+ virCommandAddArgList(cmd, "-mem-path", mem_path, NULL);
return 0;
}
@@ -7224,11 +7228,6 @@ qemuBuildMemCommandLine(virCommand *cmd,
if (!virDomainNumaGetNodeCount(def->numa))
qemuBuildMemCommandLineMemoryDefaultBackend(cmd, def, priv, defaultRAMid);
} else {
- if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE) {
- virCommandAddArgList(cmd, "-mem-prealloc", NULL);
- priv->memPrealloc = true;
- }
-
/*
* Add '-mem-path' (and '-mem-prealloc') parameter here if
* the hugepages and no numa node is specified.
diff --git a/tests/qemuxml2argvdata/fd-memory-numa-topology.args
b/tests/qemuxml2argvdata/fd-memory-numa-topology.args
index c8c1b0a613..be0539cbe4 100644
--- a/tests/qemuxml2argvdata/fd-memory-numa-topology.args
+++ b/tests/qemuxml2argvdata/fd-memory-numa-topology.args
@@ -12,10 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
-m 14336 \
--mem-prealloc \
-realtime mlock=off \
-smp 8,sockets=1,cores=8,threads=1 \
--object
memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node0,share=on,size=15032385536
\
+-object
memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node0,share=on,prealloc=on,size=15032385536
\
-numa node,nodeid=0,cpus=0-7,memdev=ram-node0 \
-uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \
-display none \
diff --git a/tests/qemuxml2argvdata/fd-memory-numa-topology2.args
b/tests/qemuxml2argvdata/fd-memory-numa-topology2.args
index c07a6b1244..9271bb072e 100644
--- a/tests/qemuxml2argvdata/fd-memory-numa-topology2.args
+++ b/tests/qemuxml2argvdata/fd-memory-numa-topology2.args
@@ -12,12 +12,11 @@ QEMU_AUDIO_DRV=none \
-S \
-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
-m 28672 \
--mem-prealloc \
-realtime mlock=off \
-smp 20,sockets=1,cores=8,threads=1 \
--object
memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node0,share=off,size=15032385536
\
+-object
memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node0,share=off,prealloc=on,size=15032385536
\
-numa node,nodeid=0,cpus=0-7,memdev=ram-node0 \
--object
memory-backend-file,id=ram-node1,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node1,share=on,size=15032385536
\
+-object
memory-backend-file,id=ram-node1,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node1,share=on,prealloc=on,size=15032385536
\
-numa node,nodeid=1,cpus=8-15,memdev=ram-node1 \
-uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \
-display none \
diff --git a/tests/qemuxml2argvdata/fd-memory-numa-topology3.args
b/tests/qemuxml2argvdata/fd-memory-numa-topology3.args
index 5b2e8af09b..951fddf868 100644
--- a/tests/qemuxml2argvdata/fd-memory-numa-topology3.args
+++ b/tests/qemuxml2argvdata/fd-memory-numa-topology3.args
@@ -12,14 +12,13 @@ QEMU_AUDIO_DRV=none \
-S \
-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
-m 43008 \
--mem-prealloc \
-realtime mlock=off \
-smp 32,sockets=1,cores=24,threads=1 \
--object
memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node0,share=on,size=15032385536
\
+-object
memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node0,share=on,prealloc=on,size=15032385536
\
-numa node,nodeid=0,cpus=0-1,memdev=ram-node0 \
--object
memory-backend-file,id=ram-node1,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node1,share=on,size=15032385536
\
+-object
memory-backend-file,id=ram-node1,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node1,share=on,prealloc=on,size=15032385536
\
-numa node,nodeid=1,cpus=2-3,memdev=ram-node1 \
--object
memory-backend-file,id=ram-node2,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node2,share=off,size=15032385536
\
+-object
memory-backend-file,id=ram-node2,mem-path=/var/lib/libvirt/qemu/ram/-1-instance-00000092/ram-node2,share=off,prealloc=on,size=15032385536
\
-numa node,nodeid=2,cpus=4-5,memdev=ram-node2 \
-uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \
-display none \
diff --git a/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
b/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
index 203754373d..9f15f28672 100644
--- a/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
@@ -15,6 +15,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-pc/.config \
-m 1024 \
-overcommit mem-lock=off \
-smp 2,sockets=2,cores=1,threads=1 \
+-mem-prealloc \
-numa node,nodeid=0,cpus=0-1,mem=1024 \
-uuid bb508b28-d57b-44bd-9e9c-a134cef24b60 \
-display none \
--
2.32.0
7:08 a.m.
On a Thursday in 2021, Michal Privoznik wrote:
This is a result of mu discussion with Jing:
https://listman.redhat.com/archives/libvir-list/2021-September/msg00407.html
Turns out, the problem has nothing to do with my virtio-mem patches so
I'm sending fix separately.
Michal Prívozník (2):
qemuxml2argvtest: Introduce another numa-topology test
qemu_command: Generate -mem-prealloc in one corner case more
src/qemu/qemu_command.c | 17 ++++-----
.../fd-memory-numa-topology.args | 3 +-
.../fd-memory-numa-topology2.args | 5 +--
.../fd-memory-numa-topology3.args | 7 ++--
...d-memory-numa-topology4.x86_64-latest.args | 34 +++++++++++++++++
.../fd-memory-numa-topology4.xml | 37 +++++++++++++++++++
tests/qemuxml2argvtest.c | 1 +
...fd-memory-numa-topology4.x86_64-latest.xml | 1 +
tests/qemuxml2xmltest.c | 1 +
9 files changed, 88 insertions(+), 18 deletions(-)
create mode 100644 tests/qemuxml2argvdata/fd-memory-numa-topology4.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/fd-memory-numa-topology4.xml
create mode 120000 tests/qemuxml2xmloutdata/fd-memory-numa-topology4.x86_64-latest.xml
Reviewed-by: Ján Tomko <jtomko(a)redhat.com>
Jano
1099
days inactive
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days old
3 comments
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participants (2)
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Michal Privoznik